“percussion drilling”的概念、定义、翻译、参考文献-科学参考

单词	percussion drilling
释义	percussion drilling [pǝr`kǝsh·ǝn ´dril·iŋ] ^{MECHANICAL ENGINEERING} A drilling method in which hammer blows are transmitted by the drill rods to the drill bit.
随便看	meconin meconium meconium ileus Mecoptera mecystasis media media conversion media conversion buffer mediad medial medial arteriosclerosis medial calcinosis medial lemniscus medial moraine medial necrosis media migration median median effective dose median infective dose median lethal dose median lethal time median mass median maxillary cyst median nasal process median nerve test

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